Graphical user interface for a display screen or portion thereof



FIG. 1 is a front view of a graphical user interface for a display screen or portion thereof showing my new design;

FIG. 2 is a front of a second embodiment thereof;

FIG. 3 is a front view of a third embodiment thereof;

FIG. 4 is a front view of a fourth embodiment thereof;

FIG. 5 is a front view of a fifth embodiment thereof;

FIG. 6 is a front view of sixth embodiment thereof;

FIG. 7 is a front view of a seventh embodiment thereof; and,

FIG. 8 is a front view of an eighth embodiment thereof.

The broken line showing of a portion of the display screen forms no part of the claimed design.

The AT&T trademark in the upper left corner of the Figures is a registered trademark of AT&T Intellectual Property. II, L.P. Trademarks are the property of their respective owners. 

The ornamental design for a graphical user interface for a display screen or portion thereof, as shown and described. 